| 摘要 |
<p>Disclosed are a packet network synchronization method, apparatus and system. The method comprises: a synchronous device mapping a synchronization status of a frequency layer to a synchronization status message of a time layer, and informing a downstream node of the time layer of same, so that the downstream node of the time layer determines whether to perform protection switching and/or track an upstream reference source according to the synchronization status message. The present invention is adopted to realize correlation processing of a frequency layer and a time layer, message generation and fast informing of a downstream network, so that a downstream synchronous device can perform corresponding processing, avoiding the problem that the downstream network cannot normally switch when a reference source and an upstream synchronization link have failed, and also an end device is capable of entering a holdover mode in time, thus improving the synchronization performance of a synchronous network.</p> |
